Bicycle frame



FIG. 1 is a top, front and side perspective view of a first embodiment of a bicycle frame embodying our new design.

FIG. 2 is a side view thereof.

FIG. 3 is a side view thereof opposite the side view of FIG. 2.

FIG. 4 is a top view thereof.

FIG. 5 is a bottom view thereof.

FIG. 6 is a front view thereof.

FIG. 7 is a back view thereof.

FIG. 8 is a top, front and side perspective view of a second embodiment of a bicycle frame embodying our new design.

FIG. 9 is a side view thereof.

FIG. 10 is a side view thereof opposite the side view of FIG. 9.

FIG. 11 is a top view thereof.

FIG. 12 is a bottom view thereof.

FIG. 13 is a front view thereof.

FIG. 14 is a back view thereof.

FIG. 15 is a top, front and side perspective view of a third embodiment of a bicycle frame embodying our new design.

FIG. 16 is a side view thereof.

FIG. 17 is a side view thereof opposite the side view of FIG. 16.

FIG. 18 is a top view thereof.

FIG. 19 is a bottom view thereof.

FIG. 20 is a front view thereof; and,

FIG. 21 is a back view thereof.

Broken lines are used to illustrate features of the bicycle frame which form no part of the claimed design. The broken lines immediately adjacent the shaded areas represent the bounds of the claimed design while all other broken lines are directed to environmental structure. 

The ornamental design for a bicycle frame, as shown and described. 